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Figure 5 | Plant Methods

Figure 5

From: Rapid metabolic profiling of Nicotiana tabacum defence responses against Phytophthora nicotianae using direct infrared laser desorption ionization mass spectrometry and principal component analysis

Figure 5

Biological response index and comparison with dead cell count values. (A) Biological response index (BRI, f(PC 1,PC 2)) obtained from the PCA shown in Figure 4 (see text for detailed explanation of the procedure). Samples labeled with a preceding "X*" represent samples from N. tabacum (cv. Xanthi), * represents the sample treatment (see text for details). (B) Comparison between BRI and the dead cell count (DCC, %) determined for differently treated SNN samples. Solid line: Best fit according to BRI = a + b*Ln(DCC), where a = 2.6044 and b = 1.6535 (R2 = 0.9986). The shaded area indicates the threshold in terms of DCC that defines a positive HR.

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Plant Methods

ISSN: 1746-4811